U.S. patent number 10,393,321 [Application Number 15/772,449] was granted by the patent office on 2019-08-27 for led light bulb.
This patent grant is currently assigned to ZHEJIANG SHENGHUI LIGHTING CO., LTD.. The grantee listed for this patent is ZHEJIANG SHENGHUI LIGHTING CO., LTD.. Invention is credited to Linzhang Liu, Yehua Wan.
United States Patent |
10,393,321 |
Wan , et al. |
August 27, 2019 |
LED light bulb
Abstract
An LED light bulb comprises at least one LED light source; a
driver arranged in an electrical connection with the LED light
source to drive and control the LED light source to emit light; a
base electrically connecting the driver to an outside power source;
a heat sink provided to dissipate heat generated by the LED light
source, having a supporting portion to receive and support the LED
light source; a housing joined to the base to accommodate the LED
light source, the heat sink and the driver to integrate as a whole.
The present disclosure provides an LED light bulb which has an
appearance of the traditional incandescent light bulb.
Inventors: |
Wan; Yehua (Jiaxing,
CN), Liu; Linzhang (Jiaxing, CN) |
Applicant: |
Name |
City |
State |
Country |
Type |
ZHEJIANG SHENGHUI LIGHTING CO., LTD. |
Jiaxing |
N/A |
CN |
|
|
Assignee: |
ZHEJIANG SHENGHUI LIGHTING CO.,
LTD. (Jiaxing, CN)
|
Family
ID: |
57465027 |
Appl.
No.: |
15/772,449 |
Filed: |
June 29, 2017 |
PCT
Filed: |
June 29, 2017 |
PCT No.: |
PCT/CN2017/090696 |
371(c)(1),(2),(4) Date: |
April 30, 2018 |
PCT
Pub. No.: |
WO2018/001290 |
PCT
Pub. Date: |
January 04, 2018 |
Prior Publication Data
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|
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Document
Identifier |
Publication Date |
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US 20180320829 A1 |
Nov 8, 2018 |
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Foreign Application Priority Data
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|
|
|
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Jun 30, 2016 [CN] |
|
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2016 1 0526917 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F21V
23/006 (20130101); F21K 9/232 (20160801); F21V
29/70 (20150115); F21V 3/061 (20180201); F21K
9/238 (20160801); F21Y 2107/60 (20160801); F21Y
2115/15 (20160801); F21V 29/89 (20150115); F21V
29/86 (20150115); F21Y 2107/40 (20160801); F21Y
2115/10 (20160801); F21Y 2107/70 (20160801); F21V
29/87 (20150115) |
Current International
Class: |
F21V
29/00 (20150101); F21V 29/70 (20150101); F21V
3/06 (20180101); F21K 9/238 (20160101); F21K
9/232 (20160101); F21V 29/89 (20150101); F21V
29/87 (20150101); F21V 29/85 (20150101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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103423646 |
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Dec 2013 |
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CN |
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103672526 |
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Mar 2014 |
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CN |
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104879661 |
|
Sep 2015 |
|
CN |
|
105972461 |
|
Sep 2016 |
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CN |
|
106195679 |
|
Dec 2016 |
|
CN |
|
205842277 |
|
Dec 2016 |
|
CN |
|
205842279 |
|
Dec 2016 |
|
CN |
|
2295849 |
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Mar 2011 |
|
EP |
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Other References
The World Intellectual Property Organization (WIPO) International
Search Report and Written Opinion for PCT/CN2017/090696 dated Oct.
9, 2017 12 Pages. cited by applicant.
|
Primary Examiner: Coughlin; Andrew J
Attorney, Agent or Firm: Anova Law Group, PLLC
Claims
What is claimed is:
1. An LED light bulb, comprising: at least one LED light source
including a first LED strip and a second LED strip, each of the
first LED strip and the second LED strip having a plurality of LED
chips; a driver arranged in an electrical connection with the LED
light source to drive and control the LED light source to emit
light; a base electrically connecting the driver to an outside
power source; a heat sink provided to dissipate heat generated by
the LED light source, comprising a supporting portion to support
the LED light source; and a housing coupled to the base to
accommodate the LEI) light source, the heat sink and the driver to
integrate as the claimed LED light bulb, wherein: the first LED
strip includes a first middle portion and first wings folded and
positioned at two sides of the first middle portion, and the
plurality of LED chips are placed on the first wings, the second
LED strip includes a second middle portion and second wings folded
and positioned at two sides of the second middle portion, and the
plurality of LED chips are placed on the second wings, and the
first LED strip and the second LED strip are stacked and
electrically connected at the first and second middle portions.
2. The LED light bulb according to claim 1, wherein the first wings
and the first middle portion are approximately perpendicular, and
the second wings and the second middle portion are approximately
perpendicular.
3. The LED light bulb according to claim 1, wherein the first LED
strip and the second LED strip are stacked at the first and second
middle portions, and a middle portion is exposed and in contact
with a LED chip.
4. The LED light bulb according to claim 3, wherein the first LED
strip is stacked on top of the second LED strip, and the first
middle portion includes a hollow-out to expose the LED chip of the
second middle portion at bottom.
5. The LED light bulb according to claim 1, wherein the first
middle portion, the first wings, the second middle portion and the
second wings are rectangular.
6. The LED light bulb according to claim 1, wherein the first LED
strip further includes a first flexible circuit board, two sides of
the first middle portion are spaced from the first wings, and the
first middle portion and the first wings are connected by the first
flexible circuit board.
7. The LED light bulb according to claim 1, wherein the second LED
strip further includes a second flexible board, two sides of the
second middle portion are spaced from the second wings, and the
second middle portion and the second wings are connected by the
second flexible circuit board.
8. The LED light bulb according to claim 1, wherein the supporting
portion is a rectangular prism including at least two faces in
contact with the LED light source for supporting the LED light
source.
9. The LED light bulb according to claim 1, wherein the heat sink
has a hole in its body, the LEI) light source comprises a pin
socket electrically connecting the LED chips, and the driver
comprises pins so that the pins pass through the hole and are
inserted into the pin socket to form an electrical connection
between the LED light source and the driver.
10. The LED light bulb according to claim 1, wherein the heat sink
further comprises two guiding grooves on an inner wall to receive
and fasten two sides of the driver.
11. The LED light bulb according to claim 1, further comprising a
protection cover, wherein the protection cover includes a body and
hook slots at two ends of the body, and two sides of the driver are
inserted into the hook slots of the protection cover.
12. The LED light bulb according to claim 1, wherein the housing is
non-transparent and made of glass.
13. The LED light bulb according to claim 1, wherein the housing
and the base are glued together.
14. The LED light bulb according to claim 1, wherein the heat sink
is made of a thermal-conducting plastic, and the heat sink is
joined to the base.
15. The LED light bulb according to claim 1, further comprising an
insulator disposed at one end of the heat sink, wherein the heat
sink is made of a thermal-conducting metal, and the insulator and
the base are joined to provide an electrical insulation between the
heat sink and the base.
16. The LED light bulb according to claim 15, wherein the insulator
and the heat sink are combined by a plastic-aluminum injection
molding process.
Description
CROSS-REFERENCE TO RELATED APPLICATION
This application is a national phase entry under 35 U.S.C. .sctn.
371 of International Application No. PCT/CN2017/090696, filed on
Jun. 29, 2017, which claims priority of Chinese Patent Application
No. 201610526917.4, filed on Jun. 30, 2016, the entire content of
which is hereby incorporated by reference.
FIELD OF THE DISCLOSURE
The present disclosure relates to the field of the LED illumination
technologies. In particular, it relates to an LED light bulb.
BACKGROUND
Many LED light bulbs have a look which is different from the
traditional incandescent light bulbs. Most of the conventional LED
light bulbs are in a semi-sphere configuration, due to the addition
of a barrel-shaped heat sink arranged at one end. Compared to the
traditional incandescent light bulbs, the heat sink of the
conventional LED light bulb may occupy almost one-half of the
volume size, leaving a smaller available space to build in other
components. It thus brings the limitation to the structural design
for the LED light source of the LED light bulb, causing difficulty
in achieving wide-angle emission.
BRIEF SUMMARY OF THE DISCLOSURE
A housing of the disclosed LED light bulb is joined to a base to
form a receiving space to accommodate a heat sink, an LED light
source and other elements inside. This provides an LED light bulb
which has a similar configuration and appearance of the traditional
incandescence light bulb. The embodiments of the present disclosure
provide design flexibility, facilitate wide-angle emission designs,
and solves heat dissipation issues.
One aspect of the present disclosure provides an LED light bulb,
comprising at least one LED light source including a plurality of
LED chips; a driver arranged in an electrical connection with the
LED light source to drive and control the LED light source to emit
light; a base electrically connecting the driver to an outside
power source; a heat sink provided to dissipate heat generated by
the LED light source, comprising a supporting portion to receive
and support the LED light source; and a housing joined to the base
to accommodate the LED light source, the heat sink and the driver
to integrate as the claimed LED light bulb. Further, the housing
may be a glass bulb that diffuses light emitted from the LED light
source. To improve the light diffusion effect and at the same time
cover the heat sink and other components, the glass bulb may be a
non-transparent glass bulb, such as a white glass bulb, a yellow
glass bulb, etc.
In one embodiment of the present disclosure, the LED light source
comprises a first LED strip and a second LED strip, wherein the
first LED strip includes a first middle portion and first wings
folded and positioned at two sides of the first middle portion, and
the LED chips are provided on the first wings; the second LED strip
includes a second middle portion and second wings folded and
positioned at two sides of the second middle portion, and the LED
chips are provided on the second wings; and the first LED strip and
the second LED strip are stacked and electrically connected at the
first and second middle portions.
Further, the first wings and the first middle portion are
approximately perpendicular, and the second wings and the second
middle portion are approximately perpendicular. In such an
arrangement, the LED light source forms a rectangular prism,
providing a wide-angle emission.
For better illumination, when the first LED strip and the second
LED strip are stacked at the first and second middle portions, an
uncovered middle portion is provided with the LED chips.
In one embodiment, the first LED strip is stacked on top of the
second LED strip, and the first middle portion is provided with a
hollow-out to expose the LED chips of the second middle portion at
bottom. In such an arrangement, the middle portions are electrical
connected and bring more LED chips for illumination.
Preferably, the first middle portion, the first wings, the second
middle portion and the second wings are rectangular.
In one instance, the first LED strip further includes a first
flexible circuit board, two sides of the first middle portion are
spaced from the first wings, and the first middle portion and the
first wings are connected by the first flexible circuit board.
Similarly, the second LED strip further includes a second flexible
board, two sides of the second middle portion are spaced from the
second wings, and the second middle portion and the second wings
are connected by the second flexible circuit board. The application
of the flexible circuit boards establishes mechanical as well as
electrical connections between the wings and the middle portions,
and provides deformation flexibility.
Further, the supporting portion is a rectangular prism including at
least two faces in contact with the LED light source for supporting
the LED light source.
In order to connect the LED light source and the driver, a hole is
provided in the body of the heat sink. The LED light source
comprises a pin socket electrically connecting the LED chips, and
the driver comprises pins so that the pins pass through the hole
and are inserted into the pin socket for an electrical connection
between the LED light source and the driver. In such an
arrangement, soldering is not required.
In order to fasten and secure the driver, the heat sink further
comprises two guiding grooves on an inner wall to receive and
fasten two sides of the driver inside.
In order to avoid a short circuit between the driver and other
elements, the LED light bulb further comprises a protection cover,
wherein the protection cover includes a body and hook slots at two
ends of the body, and two sides of the driver are inserted into the
hook slots of the protection cover.
In order to enhance diffusion effect, the housing is
non-transparent and made of glass. Further, the housing and the
base are glued to combine.
In one instance, the heat sink is made of a thermal-conducting
plastic, and the heat sink is joined to the base. In such an
arrangement, the heat sink is supported by the base, and heat
conducted through the heat sink travels to the base for heat
dissipation.
In another instance, the LED light bulb further comprises an
insulator disposed at one end of the heat sink, wherein the heat
sink is made of a thermal-conducting metal, and the insulator and
the base are joined. In such an arrangement, it provides an
electrical insulation between the heat sink and the base to avoid a
short circuit.
Further, the insulator and the heat sink are combined by a
plastic-aluminum injection molding process. By means of such a
process, it forms the insulator and heat sink as a whole, and heat
conducted to the heat sink can travel to the insulator rapidly.
In embodiments of the present disclosure, the heat sink, the LED
light source and other components are accommodated inside a housing
which is joined to a base. The housing may be a glass bulb. The
overall appearance of the LED light bulb is the same as, or
substantially the same as the appearance of an incandescence light
bulb. Accordingly, the present disclosure makes the structural
design of the LED light source more flexible, easier to achieve
wide-angle emitting design. The heat generated by the LED light
source is thermally conducted to the base through the heat sink,
thereby solving the heat dissipation problem. Meanwhile, the
overall design is simple and easy to implement.
BRIEF DESCRIPTION OF THE DRAWINGS
The following drawings are merely examples for illustrative
purposes according to various disclosed embodiments and are not
intended to limit the scope of the present disclosure in any
way.
FIG. 1 is a front view of an LED light bulb consistent with the
present disclosure;
FIG. 2 is a partial cross-sectional view showing an internal
structure of the LED light bulb in FIG. 1;
FIG. 3 is a cross-sectional view of the LED light bulb as shown in
FIG. 1;
FIG. 4 is a perspective view of a heat sink having a supporting
portion consistent with the present disclosure;
FIG. 5 is an exploded view of the LED light bulb consistent with
the present disclosure;
FIG. 6 is another exploded view of the LED light bulb shown in FIG.
5, from another angle; and
FIG. 7 is an exploded view of the LED light bulb consistent with
the present disclosure.
DETAILED DESCRIPTION
Detailed descriptions and technical contents according to
embodiments of the present disclosure will be described with regard
to the accompanying drawings shown below. In addition, the drawings
are not necessarily prepared in an actual proportion. It is
apparent that the proportions of the drawings are not intended to
limit the scope of the present disclosure as claimed.
As illustrated in FIGS. 1-7, one aspect of the present disclosure
provides a Light Emitting Diode (LED) light bulb, which comprises a
base 10, a heat sink 11, a driver 12, a housing 13 and at least one
LED light source 50. The housing 13 is joined to the based 10 to
form an inner space to accommodate the heat sink 11, the driver 12
and the LED light source 50. In consideration of enhancing
diffusion reflection, the housing 13 may not be transparent and may
be made of glass. For example, the housing 13 may be made of white
glass, or glass of other colors. In one instance, the housing 13
and the base 10 are glued to combine. The driver 12 has an
electrical connection with the LED light source 50 to drive and
control the LED light source 50 to emit light. The LED light source
50 provides a light source. The housing 13 may be of any desirable
shapes resembling the shapes of incandescence bulbs.
In reference to FIGS. 5-7, the LED light source 50 comprises a
first LED strip 1 and a second LED strip 2. The first LED strip 1
includes a first middle portion 3, first wings 4 and a first
flexible circuit board 8. Preferably, the first wings 4 are folded
and positioned symmetrically at two sides of the first middle
portion 3. A plurality of LED chips 5 are provided on the first
wings 4. The second LED strip 2 includes a second middle portion 6,
second wings 7 and a second flexible circuit board 9, and a
plurality of LED chips 5 are provided on the second wings 7.
Similar to the arrangement of the first wings 4, the second wings 7
are folded and positioned symmetrically at two sides of the second
middle portion 6.
In one embodiment, the LED strip 1 and the second LED strip 2 are
cross-stacked and electrically connected at the first middle
portion 3 and the second middle portion 6. In one instance, the
first middle portion 3 and the second middle portion 6 are
connected by the process of spot welding.
In one instance, the first wings 4 and the first middle portion 3
are approximately perpendicular, while the second wings 7 and the
second middle portion 6 are approximately perpendicular. When being
stacked at the middle portions 3 and 6, an uncovered middle portion
(either top or bottom) is provided with the LED chips 5 for more
illumination. For instance, as shown in FIG. 6, when the first LED
strip 1 is stacked on top of the second LED strip 2, the first
middle portion 3 on top is provided with a hollow-out to expose the
LED chips 5 of the uncovered second middle portion 6 at bottom for
more illumination.
The middle portions 3 and 6 can be in a rectangular shape, and the
wings 4 and 7 can also be in a rectangular shape. The LED chips 5
are provided on the flexible circuit boards 8 and 9 and disposed on
the wings 4 and 7 and the uncovered middle portions 3 and 6. In one
instance, the wings are formed by bending at two sides of middle
portion and connected to the middle portion. In another instance,
the middle portion and the corresponding wings are separated with a
space and connected by the corresponding flexible circuit board.
More specifically, two sides of the first middle portion 3 are
spaced from the first wings 4, and the first middle portion 3 and
the first wings 4 are connected by the first flexible circuit board
8. And two sides of the second middle portion 6 are spaced from the
second wings 7, and the second middle portion 6 and the second
wings 7 are connected by the second flexible circuit board 9. The
LED chips 5 are disposed on the first flexible circuit board 8 and
the second flexible circuit board 9 respectively.
A body of the heat sink 11 is, in a cylindrical configuration,
which is hollow. The driver 12 is a driver circuit board and is
disposed inside the heat sink 11. As illustrated in FIG. 4, the
heat sink 11 comprises a supporting portion 30 for receiving and
supporting the LED light source 50. In one instance, the supporting
portion 30 is hollow and has a configuration matching to that of
the LED light source 50 for a fit. The LED light source 50 are
shelved onto the supporting portion 30 of the heat sink 11 in
assembly to provide a multi-faced lighting source.
More specifically, the heat sink 11 can be made of metal, ceramics,
or plastic material of certain heat dissipation ability. In one
instance, the heat sink 11 is made of aluminum, and the LED light
bulb further comprises an insulator 21 disposed at one end of the
heat sink 11. The insulator 21 is made of a thermal-conducting
plastic. In one instance, the insulator 21 and the base 10 are
screwed to combine to provide an electrical insulation between the
heat sink 11 and the base 10. In this case, the insulator 21 and
the heat sink 11 can be combined by a plastic-aluminum injection
molding process. In another instance, the heat sink 11 is made of a
thermal-conducting plastic, and the heat sink 11 can be directly
joined to the base 10.
Preferably, the supporting portion 30 of the heat sink 11 is a
rectangular prism. In this configuration, the supporting portion 30
includes a top face to contact and support the middle portions 3
and 6 of the LED light source 50, and at least one side face in
contact with the wings 4 and 7. The side faces are comprised of
four enclosing planes 14. In one embodiment, further, the wings 4
and 7 of the LED light source 50 are in contact with the
corresponding planes 14.
As illustrated in FIGS. 4 and 7, a hole 15 is provided through the
body of the heat sink 11, at the end of the supporting portion 30
remote from the LED light source 50. The driver 12 comprises pins
16, while the LED light source 50 comprises a pin socket 17 at an
end adjacent to the driver 12. The pin socket 17 is disposed on one
of the flexible circuit boards 8, 9 and electrically connects the
LED chips 5. In one embodiment, the pins 16 of the driver 12 pass
through the hole 15 and are inserted into the pin socket 17 of the
LED light source 50 to establish an electrical connection between
the driver 12 and the LED light source 50.
FIG. 2 is a cross-sectional view partially showing an internal
structure of the LED light bulb. As illustrated, two guiding
grooves 18 are provided on an inner wall of the heat sink 11. When
the driver 12 is inserted into the heat sink 11, the guiding
grooves 18 receive and fasten two sides of the driver 12 for an
assembly. In one instance, the two guiding grooves 18 are
symmetrically disposed inside the heat sink 11.
Moreover, as illustrated in FIGS. 3 and 7, the LED light bulb
further comprises a protection cover 19 as provided to hook with
the driver 12 for a protection. More specifically, the protector
cover 19 comprises a body 20 and hook slots 22 at two ends of the
body 20. From a side view, each of the hook slots 22 forms an
L-shape. Two sides of the driver 12 are inserted into the hook
slots 22 of the protection cover 19 for the protection.
In some embodiments, the LED light source 50 may include more than
two LED strips. For example, the LED light source 50 may include
three LED strips. Each LED strip includes two wings to hold the LED
chips, and a middle portion similar to middle portions 3 or 6. The
middle portions of the LED strips may be electrically connected.
The middle portions of the LED strips may be fixed on the
supporting portion 30 or the top face of the supporting portion 30.
The supporting portion 30 may be a hexagonal shape, which provides
supporting surfaces for the six wings of the three LED strips. In
another example, the LED light source 50 may include four LED
strips. Each LED strip includes two wings to hold the LED chips,
and a middle portion similar to middle portions 3 or 6. The middle
portions of the LED strips may be electrically connected. The
middle portions of the LED strips may be fixed on the supporting
portion 30 or the top face of the supporting portion 30. The
supporting portion 30 may be an octagonal shape, which provides
supporting surfaces for the eight wings of the three LED
strips.
In some embodiments, the LED light source 50 may include straight
LED wings/strips, curved wings/strips, or jagged wings/strips. In
some embodiments, the supporting portion 30 may be of a cylinder or
a cone shape. The LED wings 4 and 7 may be curvy strips and may be
supported by the supporting portion 30.
While the present disclosure has been particularly described in
terms of the various forms and examples, the forms and examples do
not recite all details and should not be used to limit the present
disclosure. They are applied for a better explanation. There might
be alternative, modifications and variations. And it is to be
understood that many alternatives, modifications and variations
will be apparent to those skilled in the art in light of the
foregoing description. It is therefore contemplated that the
appended claims will embrace any such alternatives, modifications
and variations as falling within the true scope and spirit of the
present disclosure.
* * * * *